The European Commission has launched a comprehensive investigation into Amazon Web Services (AWS) and Microsoft Azure that could designate both cloud giants as "gatekeepers" under the Digital Markets Act (DMA), potentially forcing significant changes to their business practices across European cloud markets. This regulatory move represents one of the most significant challenges yet to the dominance of American cloud providers in the European Union's rapidly expanding digital infrastructure sector.

The DMA Gatekeeper Framework Explained

The Digital Markets Act, which became fully applicable in May 2023, establishes a set of objective criteria for designating large digital platforms as "gatekeepers"—companies that serve as crucial gateways between businesses and consumers in digital markets. To qualify as a gatekeeper, a company must meet three cumulative criteria: have a strong economic position with significant impact on the internal market, operate a core platform service that serves as an important gateway for business users to reach end users, and enjoy an entrenched and durable position in its operations.

According to European Commission documentation, the quantitative thresholds include having an annual turnover of at least €7.5 billion within the EU in each of the last three financial years, or a market capitalization of at least €75 billion in the last financial year, and providing the same core platform service in at least three EU member states. Additionally, the company must have at least 45 million monthly active end users established or located in the EU and at least 10,000 yearly active business users established in the EU in the last financial year.

The Investigation Scope and Timeline

The European Commission's investigation will examine whether AWS and Microsoft Azure meet the DMA's gatekeeper thresholds for several core platform services, including cloud computing services, online intermediation services, and other digital infrastructure offerings. The Commission has up to five months to complete its preliminary investigation and determine whether to open a market investigation, which could last up to an additional nine months.

Margrethe Vestager, Executive Vice-President in charge of competition policy, stated that "the cloud sector is of strategic importance for the European economy, and we need to ensure that it remains competitive and innovative." The investigation will specifically examine whether these companies control access to critical cloud infrastructure in ways that could harm competition and limit consumer choice.

Market Dominance Concerns in European Cloud

Recent market analysis reveals the scale of AWS and Microsoft's dominance in the European cloud market. According to Synergy Research Group data, AWS holds approximately 32% of the European cloud infrastructure market, while Microsoft Azure commands around 22%. Google Cloud follows with approximately 11% market share, while European providers like Deutsche Telekom, OVHcloud, and SAP collectively hold less than 20% of the market.

The investigation comes amid growing concerns from European businesses and policymakers about dependency on non-EU cloud providers. A 2023 study by the European Parliamentary Research Service highlighted that over 70% of European enterprises using cloud services rely on US-based providers, raising questions about data sovereignty, regulatory compliance, and strategic autonomy.

Potential DMA Obligations for Cloud Gatekeepers

If designated as gatekeepers under the DMA, AWS and Azure would face significant new obligations that could reshape their European operations. These include:

  • Interoperability requirements: Ensuring their services can work with competing cloud services and allowing business users to access data generated through their platform
  • Data access provisions: Providing business users with access to the data they generate in using the gatekeeper's platform
  • Fair terms and conditions: Prohibiting self-preferencing and ensuring fair and non-discriminatory conditions for business users
  • Advertising transparency: Providing advertisers and publishers with access to the performance measuring tools and information necessary for them to carry out their own independent verification of their advertisements
  • Merger restrictions: Informing the European Commission of any intended concentrations in the digital sector

Industry and Competitor Reactions

The investigation has drawn mixed reactions from across the technology industry. European cloud providers have largely welcomed the move, with OVHcloud CEO Michel Paulin stating that "the dominance of a few non-European players threatens the development of a sovereign European cloud ecosystem." Similarly, Deutsche Telekom has advocated for stronger European cloud capabilities to reduce dependency on US providers.

However, industry groups representing technology companies have expressed concerns about potential regulatory overreach. DigitalEurope, which represents the digital technology industry in Europe, warned that "overly restrictive measures could hamper innovation and limit the benefits that European businesses derive from cloud computing."

AWS and Microsoft have both issued statements emphasizing their commitment to compliance with EU regulations. An AWS spokesperson noted that "the cloud has been one of the most competitive and innovative technology sectors, and we look forward to engaging constructively with the European Commission." Microsoft stated that it is "committed to the success of our European customers and partners and to complying with all applicable EU laws and regulations."

Historical Context: Previous EU Actions

This investigation builds on previous EU regulatory actions targeting major US technology companies. The European Commission has previously fined Google over €8 billion for various competition violations and has ongoing investigations into Apple's App Store practices and Meta's data usage.

In the cloud sector specifically, the French competition authority fined Google €250 million in March 2024 for anticompetitive practices in the online advertising market, while the German Bundeskartellamt has been investigating Amazon's potential dominance across multiple digital markets.

Technical Implications for Cloud Services

If designated as gatekeepers, AWS and Azure would need to make significant technical changes to their European cloud offerings. These could include:

  • Enhanced data portability: Developing standardized tools for customers to migrate their data and applications to competing cloud providers
  • API accessibility: Ensuring that their application programming interfaces are fully documented and accessible to third-party developers
  • Service interoperability: Modifying their cloud infrastructure to enable seamless integration with competing services
  • Pricing transparency: Providing clearer information about service costs and eliminating potentially unfair pricing practices

Economic Impact Assessment

The economic stakes are substantial for all parties involved. The European cloud market is projected to reach €135 billion by 2025, according to the European Commission's own estimates. For AWS and Microsoft, European operations represent significant revenue streams, with AWS generating approximately €7.8 billion in EU revenue in 2023 and Azure contributing substantially to Microsoft's commercial cloud business, which exceeded €23 billion in EU revenue during the same period.

For European businesses, the investigation's outcome could significantly affect cloud computing costs, service availability, and technological capabilities. Many European enterprises have built their digital transformation strategies around AWS and Azure services, creating potential disruption if significant service changes are required.

This investigation represents a test case for applying the DMA's gatekeeper framework to cloud computing services. The outcome could establish important precedents for how digital infrastructure services are regulated under the new framework and might influence similar regulatory efforts in other jurisdictions, including the United Kingdom's Digital Markets Unit and potential US federal digital competition legislation.

The European Commission's approach reflects a growing global trend toward more assertive regulation of digital platform markets. Similar concerns about cloud market concentration have been raised by regulators in the UK, Australia, and Japan, though the EU's DMA represents the most comprehensive regulatory framework to date.

Potential Outcomes and Timeline

The investigation could lead to several possible outcomes:

  • Gatekeeper designation: Both AWS and Azure could be designated as gatekeepers, requiring full compliance with DMA obligations
  • Partial designation: Only certain services within their cloud portfolios might be designated
  • Remedial measures: The companies might propose voluntary commitments to address competition concerns
  • Legal challenges: Either company could challenge the designation through EU courts

The full investigation process could extend into 2025, with potential compliance requirements taking effect in 2026 if gatekeeper designations are confirmed. The European Commission has emphasized that it will work closely with national competition authorities throughout the process to ensure consistent application of the DMA across member states.

Broader Implications for Digital Sovereignty

Beyond immediate competition concerns, this investigation reflects broader European efforts to assert digital sovereignty and reduce dependency on non-EU technology providers. The EU's broader digital strategy includes initiatives like GAIA-X for developing European cloud infrastructure standards and the Data Act for governing data sharing and cloud switching.

European Commission President Ursula von der Leyen has repeatedly emphasized the importance of "technological sovereignty" as a key priority for the EU's digital decade. The cloud market investigations represent a concrete manifestation of this strategic orientation, balancing open markets with strategic autonomy considerations.

Industry Adaptation and Future Outlook

As the investigation proceeds, both AWS and Microsoft are likely to intensify their engagement with European policymakers and expand their compliance efforts. Both companies have already established significant European infrastructure investments, including AWS's planned €7.8 billion investment in European sovereign cloud regions and Microsoft's €4 billion cloud and AI investment in Spain announced earlier this year.

The ultimate impact on European cloud customers will depend on how the gatekeeper obligations are implemented. While increased interoperability and data portability could benefit customers by reducing vendor lock-in, there are concerns that compliance costs might be passed through to customers through higher prices.

The investigation's outcome will likely shape the European cloud market for years to come, influencing everything from infrastructure investment patterns to enterprise digital transformation strategies. As one of the first major applications of the DMA to cloud services, this case will be closely watched by regulators, industry participants, and customers worldwide.